That commentator is full of (shhhhhh) it. It was green 1,000 or so years ago when discovered by the Vikings. There are the remnants of settlements there that have recently been found now that the glaciers are melting back a bit. Either that, or the oil companies and SUV manufacturers spent a lot of money getting fake evidence put into place.
“WORD HISTORY How did a glacier-covered island get the name Greenland? In Norse legends written in the 12th century and later, it is told that Eric the Red explored the southeast and southwest coasts of Greenland in A.D. 983-986 and gave the country its name because people would be more likely to go there if it had an attractive name. Greenland was warmer in the tenth century than it is now. There were many islands teeming with birds off its western coast; the sea was excellent for fishing; and the coast of Greenland itself had many fjords where anchorage was good. At the head of the fjords there were enormous meadows full of grass, willows, junipers, birch, and wild berries. Thus Greenland actually deserved its name. Another attraction of Greenland was that Iceland and northwestern Europe, including England, had a grievous year of famine in 976, and people were hungry for food as well as land.”
Another site covers the fact that Greenland settlements of Europeans were abandoned about 1400, during the Little Ice Age. It is still colder in Greenland now than when Eric the Red was there.
From the Smithsonian Institute,
http://www.mnh.si.edu/vikings/voyage/subset/greenland/environment.html
“Studies of environmental conditions, climate, and their interactions have produced important new information relevant to Norse extinction in Greenland. Most revealing is the detailed evidence of climatic changes that occurred in the northwestern Atlantic beginning in the early 1300s. Changes in atmospheric temperature are recorded in such diverse materials as glacier ice derived from snow falling on the Greenland Ice Cap, fossil vegetation and pollen deposited annually in lake sediments, chemical signatures in isotopic composition of sea sediments, animal and human bones, and even the species of insect pests that accompanied Vikings and their animals as they settled new lands. These indicators clearly suggest that the climate was cooling in the 14th century, and that the Greenlandic environment had been depleted of its “natural capital”—its previously untapped grasslands and animal resources-over 500 years of farming practices in this delicate arctic climate.”
Other references discuss written directions for how to reach Greenland. Around 1200 the directions started to mention avoiding the icebergs, a caution that was missing from earlier instructions. The record, both written and from core samples, shows that Greenland has been warmer in the last 1000 years than it is now. The alarms about global warming aren’t supported by Greenland’s history.
“Global warming” is a study in political opinion manipulation, not science.